Should you add milk before tea or tea before milk?

If you are referring to adding milk before or after tea supposedly it does taste better before to a connoisseur. Adding the milk before tea, lets the milk warm slowly, cools the tea, so if you have a very fine porcelain cup it does not break from heat, prevents mild curdling and scalding and makes it easier to mix. Adding milk before the tea is the traditional English way of making tea.

If you are asking whether milk should be added to tea at all, that depends on the kind of tea and your taste. Typically green and white teas are not usually served with milk or sugar because of mild flavour. Strong black teas, spiced black teas, and herbal teas are more likely to be served with milk